No, normally I use oil/protein remover by AZOO to breakdown the oily-looking stuff on the surface....however, yet to apply on this tank as it is still in the initial stage.Any particular reason for asking this question ?

These tanks are nice, however did u notice that there isn't any small tropical fish around. My personal preference will be seeing schools of small tropical fishes moving around the tank together in unison...

guess one of the smoothing thing is to see the generated oxygen bubbles slowing rising in unison .. but i realise they are always small ... is it any possible to create BIG bubbles?? tat would be fun ..

No, normally I use oil/protein remover by AZOO to breakdown the oily-looking stuff on the surface....however, yet to apply on this tank as it is still in the initial stage.Any particular reason for asking this question ?